linux-kernel - [PATCH v1 RFC 1/3] dt-bindings: serial: amlogic,meson-uart: Add compatible string for G12A

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Date:   Wed, 22 Feb 2023 22:04:23 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-amlogic@...ts.infradead.org, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        jirislaby@...nel.org, neil.armstrong@...aro.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        gregkh@...uxfoundation.org,
        Christian Hewitt <christianshewitt@...il.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH v1 RFC 1/3] dt-bindings: serial: amlogic,meson-uart: Add compatible string for G12A

Amlogic G12A SoCs gained a new "divide XTAL by 2" bit. Everything else
(we know about) is identical to the UART IP on GX (GXBB/GXL/GXM) SoCs.
Add a new compatible string for this SoC so this new bit can be managed
accordingly.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
Why am I sending this as RFC? The last change in this series means
that the resulting .dtbs are not compatible with old kernels anymore.
My understanding is that this is fine and only the opposite case (using
old .dtbs on new kernels) has to be supported (which is still the case
with this series). I'd like to get some confirmation for this.


 .../devicetree/bindings/serial/amlogic,meson-uart.yaml          | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
index 7822705ad16c..3d9d51389171 100644
--- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
@@ -29,6 +29,7 @@ properties:
               - amlogic,meson8-uart
               - amlogic,meson8b-uart
               - amlogic,meson-gx-uart
+              - amlogic,meson-g12a-uart
               - amlogic,meson-s4-uart
           - const: amlogic,meson-ao-uart
       - description: Everything-Else power domain UART controller
@@ -37,6 +38,7 @@ properties:
           - amlogic,meson8-uart
           - amlogic,meson8b-uart
           - amlogic,meson-gx-uart
+          - amlogic,meson-g12a-uart
           - amlogic,meson-s4-uart
 
   reg:
-- 
2.39.2